James mtjephy



JQMURPHY. DUMPING soow.

(No Model.)

Patented Mar. 10, 1885.

W m e m I N4 PETERS. Phmu-Linm ra hnr. Washinglmv. D, 0

UNITED STATES JAMES MURPHY, or BOSTON, MAss,

ASSIGNOR, BY MESNE ASSIGNMENTS,

TO HIMSELF AND CHARLES H. SOUTHER, OF SAME PLACE.

DUMPlNG-SCOW.

SPECIFICATION forming part of Letters Patent No. 813,679, dated March10, 1885.

Application filed November 24, 1884. (No model.)

To aZLwhom it may concern.-

Be it known that 1, JAMES IVIURPHY, of

Boston, in the county of Suffolk, of the Commonwealth of Massachusetts,have invented a new and useful Improvement in Dumping- Scows; and I dohereby declare the same to be described in the following specificationand represented in the accompanying drawings, of which- Figure 1 is atop view, Fig. 2 a side elevation, Fig. 3 an end .view, Fig. 4. alongitudinal section, and Fig. 5 a transverse section, of a mud ordumping scow provided with my invention, the nature .of which is definedin the claim hereinafter presented.

The improvement relates to scows that have to their hold ormud-receiving chamber a dischargingopening at the bottom thereofprovided with a door or doors capable of being opened for the dumping ofa load and closed for supporting it, the scow being furnished withmechanism for effecting the closing of such door or doors.

In carrying out my invention I have to extend from end to end of thescow A, at its middle and immediately below the educt a of the hold I),a passage, 0, which, as shown in the aforesaid drawings, is trapezoidalin its transverse section and narrowest at top. This passage is a littledeeper than each of the gates or doors (I; which are hinged to oppositesides of the educt. The holdhas extending around it and within the scowan air chamber or chambers for floating the scow.

In Fig. 4 the scow is represented as having such air chamber or chambersboth in front and in rear of the hold, or between it and the bowand-stern of the scow, and with the passage c extendmg under them andthrough the 4o entire scow, or from end to end thereof. The

doors at of the hold are connected to liftingchains 6 by chains f,leading, as represented,

from such doors, such lifting-chains depending from a Windlass, B,extending over the hold.

I am aware that it is not new to have in a scow air-chambers, andbetween such a hold, and immediately below theeduct of such hold aflaring gate-space to extend from the bottom of the scow up to sucheduct, all being as represented in the United States Patent No. 136,578. Such gatespace did not extend from end to end of the scow, but wasclosed at each end, whereas in my improvement the gate space is part ofa passage leading lengthwise throughout the scow and open at each end inorder for water to flow freely through the passage, and in case of adumped load extending up within the gate-space, the scow can be movedlengthwise without obstruction from such load. By allowing water to flowthrough the passage from end to end of it, when the scow may be inmovement, such water will cleanse the doors or the gate-space below themof mud or any garbage that may be therein. Therefore I claim Adumping-scow, substantially as described, provided not only with-a holdopen at its bottom and there furnished with doors, but with one or moreair-chambers extending entirely around such hold, and with a passagegoing entirely through it (the said scow) from end to end thereofbetween the side and under the end air spaces or chambers, the sideairspaces 7

